.net core 3.1中将session持久化到redis，从core1.0开始，2.0/2.1,3.0/3.1每次搭建开发框架都因为session的问题搞的头大，次次踩坑，花了半天时间再次捋了一遍，发出来如果大家有跟我一样，希望能帮到你，另外如果有帮到你，记得点赞哈！！！
1.需引入的库文件
1.1：Microsoft.AspNetCore.Http.Extensions，因为.net core中的session默认只能存储字节，所以引入该库是为了解决session存储字符串
2.Microsoft.AspNetCore.Session，Microsoft.Extensions.Caching.Redis，针对session扩展
3.StackExchange.Redis为redis驱动
4.Newtonsoft.Json我自己项目常使用的序列化工具，可根据自己的需求使用
项目针对session持久化redis的配置
1 2 3 4 5 6 7 | "SessoinConfig": { // Session配置 "RedisCacheConfig": { "ConnectionString": "ip:端口,ssl=false,password=密码,defaultdatabase=redis库索引", "InstanceName": "自定义实例名" }, "SessionTimeOut": 60 //session过期时长，分钟 } |
注入实体类：
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 | /// <summary>/// Session缓存配置/// </summary>public class SessoinConfig{ /// <summary> /// session过期时长，分钟 /// </summary> public int SessionTimeOut { get; set; } /// <summary> /// 实例库索引 /// </summary> public RedisCacheConfigData RedisCacheConfig { get; set; }}/// <summary>/// Session持久化Redis配置/// </summary>public class RedisCacheConfigData{ /// <summary> /// Redis连接字符串 /// </summary> public string ConnectionString { get; set; } /// <summary> /// Redis实例名称 /// </summary> public string InstanceName { get; set; }} |
IServiceCollection扩展
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 | /// <summary>/// Session持久化至Redis/// </summary>/// <param name="services"></param>/// <param name="Configuration"></param>public static void UseSession(this IServiceCollection services, SessoinConfig sessoinConfig){ services.AddSingleton<IDistributedCache>( serviceProvider => new RedisCache(new RedisCacheOptions { Configuration = sessoinConfig.RedisCacheConfig.ConnectionString, InstanceName = sessoinConfig.RedisCacheConfig.InstanceName })); // 添加Session并设置过期时长 services.AddSession(options => { options.IdleTimeout = TimeSpan.FromMinutes(sessoinConfig.SessionTimeOut); });} |
Startup服务添加容器方法ConfigureServices
1 2 3 4 | // 读取Session配置文件IConfigurationSection sessionCacheSections = Configuration.GetSection("SessoinConfig");SessoinConfig sessionCacheConfig = sessionCacheSections.Get<SessoinConfig>();services.UseSession(sessionCacheConfig); |
Startup运行时方法Configure使用Session
1 2 | // 使用Sessionapp.UseSession(); |
自定义Session扩展
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 | /// <summary>/// Session扩展/// </summary>public static class SessionExtensions{ /// <summary> /// 添加Session /// </summary> /// <param name="session"></param> /// <param name="key"></param> /// <param name="value"></param> public static void SetObjectAsJson(this ISession session, string key, object value) { session.SetString(key, JsonConvert.SerializeObject(value)); } /// <summary> /// 添加Session /// </summary> /// <param name="session"></param> /// <param name="key"></param> /// <param name="value"></param> public static void SetObjectAsJson<T>(this ISession session, string key, T value) { session.SetString(key, JsonConvert.SerializeObject(value)); } /// <summary> /// 获取Session /// </summary> /// <typeparam name="T"></typeparam> /// <param name="session"></param> /// <param name="key"></param> /// <returns></returns> public static T GetObjectFromJson<T>(this ISession session, string key) { var value = session.GetString(key); return value == null ? default(T) : JsonConvert.DeserializeObject<T>(value); } /// <summary> /// 删除Session /// </summary> /// <param name="session"></param> /// <param name="key"></param> public static void RemoveSession(this ISession session, string key) { var value = session.GetString(key); if (value != null) { session.Remove(key); } }} |
例如我存储登录验证码
1 2 3 4 5 6 7 8 | /// <summary> /// 用户登录验证码 /// </summary> protected string ValidateCodeData { get { return HttpContext.Session.GetObjectFromJson<string>(LoginValidateCodeSessionKey); } set { HttpContext.Session.SetObjectAsJson<string>(LoginValidateCodeSessionKey, value); } } |
1 2 3 4 5 6 7 8 9 10 11 | /// <summary> /// 获取验证码 /// </summary> /// <returns></returns> public IActionResult ValidateCode() { System.IO.MemoryStream ms = _logic.LoginValidateCode(out string code, 4); ValidateCodeData = code; Response.Body.Dispose(); return File(ms.ToArray(), @"image/png"); } |
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.net core 3.0/3.1session持久化redis,session id为空
原文：https://www.cnblogs.com/lonelyxmas/p/12892421.html